CVE-2025-12760
📋 TL;DR
This vulnerability allows attackers to bypass two-factor authentication (2FA) in Drupal's Email TFA module, potentially gaining unauthorized access to user accounts. It affects Drupal sites using Email TFA module versions before 2.0.6. The bypass occurs through an alternate authentication path or channel.
💻 Affected Systems
- Drupal Email TFA module
📦 What is this software?
Email Tfa by Email Tfa Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to Drupal sites, leading to data theft, site defacement, or complete system compromise.
Likely Case
Attackers bypass 2FA for regular user accounts, accessing sensitive data and performing unauthorized actions within their permission scope.
If Mitigated
Attackers bypass 2FA but are still limited by other security controls like role-based permissions and network segmentation.
🎯 Exploit Status
Exploitation requires knowledge of the alternate authentication path but is technically simple once identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.0.6
Vendor Advisory: https://www.drupal.org/sa-contrib-2025-115
Restart Required: No
Instructions:
1. Update Email TFA module to version 2.0.6 via Drupal's update manager or Composer. 2. Clear Drupal caches. 3. Verify the update was successful.
🔧 Temporary Workarounds
Disable Email TFA module
allTemporarily disable the vulnerable module until patching is possible
drush pm:disable email_tfa
Enable additional authentication controls
allImplement IP restrictions or rate limiting on authentication endpoints
🧯 If You Can't Patch
- Implement network segmentation to isolate Drupal servers from sensitive systems
- Enable detailed authentication logging and monitor for suspicious login patterns
🔍 How to Verify
Check if Vulnerable:
Check Email TFA module version in Drupal admin at /admin/modules or via 'drush pm:list | grep email_tfa'Check Version:
drush pm:list | grep email_tfaVerify Fix Applied:
Confirm Email TFA module version is 2.0.6 or higher and test 2FA functionality📡 Detection & Monitoring
Log Indicators:
- Authentication attempts bypassing 2FA flow
- Multiple failed login attempts followed by successful login without 2FA
- Unusual user agent patterns during authentication
Network Indicators:
- HTTP requests to alternate authentication endpoints
- Authentication traffic patterns deviating from normal 2FA flow
SIEM Query:
source="drupal" AND (event_type="authentication" AND NOT 2fa_completed="true")